Photojournalist Jerry Redfern recently accompanied a team of archaeologists as they excavated at the Plain of Jars in Laos. This enigmatic landscape is filled with thousands of massive stone vessels, some fashioned more than 2,500 years ago. Redfern’s video explores how the team is searching for clues about who created these mysterious jars and what they were used for. To read an in-depth feature on excavations at the Plain of Jars, go to "Letter From Laos: A Singular Landscape."